Molding machine



Nov. 29, 1949 v Filed Jan. 21, 1946 E. F. OYSTER MOLDING MACHINE 3 Sheets-Sheet l s 32 3 28 I b 34 5 Ugo.

v 1 Z? .a 43 z 9 E FZTIU Fizr Nov. 29, 1949 E, OYSTER 2,489,810

MOLDING MACHINE Filed Jan. 21, 1946 s Shets-Sheet 2 2- I I gwvmam Nov. 29, 1949 E. F. OYSTER 2,489,810

MOLDING MACHINE Filed Jan. 21, 1946 3 Sheets-Sheet 3 o [25 I14 I 1i 1 4 I Ill l 17 3 38 Z2 6 Y l I 50 4 I ll a 3140mm .EQH F llyg'izr low M 734140 Patented Nov. 29, 1949 UNITED STATES PATENT OFFICE MOLDING MACHINE Earl F. Oyster, Cleveland, Ohio Application January 21, 1946, Serial No. 642,503

2 Claims. 1

My present invention relates to improvements in metal founding and particularly to molding machines employed in metal founding for pro,- ducing molds in which to form metal castings; and the objects of my improvements are: First, to provide a molding machine that requires less floor space than existing molding machines of like capacity; second, to provide a molding machine whereof the mold pressure arm is not required to be swung through as great an are as the mold pressure arm of existing molding machines of like capacity; third, to provide a molding machine having a mold pressure plate turnably carried by the mold pressure arm; fourth, to provide a molding machine in which the mold pressure plate will be swung out of alignment with the mold pressure arm when the mold pressure arm is swung; fifth, to provide a. molding machine whereof the mold pressure plate will be parallel with the foundry flash throughout the swing of the mold pressure arm.

These named objects and such other objects as appear from a perusal of the machines description are obtained by the molding machine structure illustrated in the accompanying drawing, in which:

Figure 1 is a front elevation view in part section with the mold pressure arm and plate in position as when a mold is being produced in the foundry flask, which is shown mounted on the mold and flask supporting mechanism of the machine. Figure 2 is a plan view of the machine in which the mold pressure arm and plate are above the foundry flask mounted on the machine with the mold pressure arm unlatched as when being swung from its latching mechanism. Figure 3 is a plan view of the machine in which the mold pressure arm and plate are swung clear of the foundry flask mounted on the machine. Figure 4 is a rear elevation view of the molding machine in which the mold pressure arm and plate are in position for pressing a mold in a foundry flask mounted on the molding machine with the pressure arm in its latched position.

Throughout the accompanying drawings, similar numerals refer to similar parts and portions of my improved molding machine.

Numeral l refers to the base of the molding machine, 2 the mold and flask supporting mechanism in part supported by a plurality of stools 3 having pistons 4 extending into cylinders 5 and moveable upward by air under pressure admitted by suitable valve mechanism into the lower end of the cylinders.

Numeral 6 refers to an extension of the base 55 l and has extending upward therefrom a mold pressure arm supporting column I which is socketed into the extension 6 and fastened therein by a nut 8 screw-threaded onto the end 9 of the column 1. Swingably supported on the column 1 between the collars l0 and H and locked thereon by ring nut 12 and on bearings carried thereby, is a mold pressure arm l3 having at its outer end a boss [4 provided with a bore through which extends a vertical pressure arm tie rod 15 screwthreaded at its upper end to receive nuts l6 and I! which securely hold the rod l5 against vertical displacement when drawn tightly against the upper and lower ends of the boss 14 and serve as longitudinal adjusting means for the tie rod.

The mold pressure arm tie rod I5 has a head l8 at its lower end, between which head and the under side of the slotted flange IQ of the tie rod latch bracket 20, a hard steel wear resisting washer plate 2| engages the said slotted flange in the pocket 22, the tie rod latch bracket is secured to the base extension 23 by bolts 24.

The mold pressure arm l3 has intermediate its ends, hollow sleeve like 'boss 25 having a bore 26 extending to the top of the arm and bore 21 of larger diameter than the bore 26 extending from said bore 23 to the machined face 28 of the large mold pressure plate engaging boss 29 against which the rotatable mold pressure plate designated by numeral 30 and having mold pressure block 30 fastened thereto is held with its hub 3| by a spindle bolt 32 having its head 33 socketed in recess 34 with packing like flbre bearing ring 35 between the upper side of the head and the bottom of the said recess. At the upper end of the spindle bolt 32 and screw threaded thereon is a flange nut 36 whereby the mold pressure plate 30 is drawn and held with sufficient force only to retain the pressure plate against the surface 28 of the boss 29 and yet permit the mold pressure plate to be readily rotated. This is done by the long link 31 pivotally connected to a bracket 38 extending from collar ll fastened on and stationary with mold pressure arm supporting column I. The opposite end of the long link 31 is pivotally connected to a bracket 39 which extends the mold pressure plate 30. Pivotal connection of the link 31 with the bracket 38 of the collar II and with the bracket 39 of the mold pressure plate, permits rotation of the mold pressure plate against the large boss 29 of the mold pressure arm l3. From the lower web of the mold pressure arm extends at each of its side edges, stop lugs 40 and hand rail 4| whereby the mold pressure arm 13 may be swung manually by the operator of the molding machine standing at a side of the machine for unlatching the vertically disposed tie rod Ii from the tie rod latch bracket 20.

Within the base I of the molding machine, but forming no part of the present invention, is a cylinder 42, having slidable therein by air pressure, a piston 44 having a cylindrical portion 45 in which isa bore 46 having slidable therein a moldesqueezespiston 4'! forming an extension of a flask support and mold jolt table mounted on which is shown a foundry flask 49. Air under pressure is admitted to the under side of thesai'd tubular connection with an air control valve housing 50 which is diagrammatically showri in Figures 1 and 2 with the valves thereinpperated by valve handles and 52.

From th aforesaid description, it iwill-be seen that when the mold pressure arm I3 is swung a to titsiunlatchedt-position showmin :Eigure :3, the moldiipressurexplate -30 will :be swung with .the ands-will have its dong: sides parallelwith. the rthei foundryifiask -Ali hy ithewnextended ivotallytconnectedzto; bracket 3&extending collar I theld stationary oncolumn 7 erudite-bracket :35 extending from the moldpressurei plate c3fls-Itgwill be'noted thatas the distance s-between sthei pivotsipins-of the; brackets.- 38 and 39.:rem'ain the :same throughout the totalzswing lot-ithermold :pressnrearm; ithe 'relative-ifinal :positioniof the. mold-pressure platewill hethe same nd the-cornersotrsaid mold-pressuraplatefnearwzeststhe. ;tiear.od 1 5: and boss 14 will Y projectxouteward oi. the IIiOldrDlESSUIB arm and;;thereby. in- I zicreased-swingi-ofsthe mold pressure arm is per- "7-? mitted. Thesupporting-eolumn 'iwfor the-mold pressuresarm scantuber-positioned: at. a elessrdis- :rstancer-zfromhthe .-center. line :extending parallel withr-the sides :-.Of:-.the foundry .flask SidQrQJidES 48*; and. ithatrrthe'sbase of the molding I machine may be considerablyrnarrower.sthansthe-base of l smoldingsmachines whereofnthe :mold pressure a. arm is limitedrin itsswinglandthemold pressure plateiststationary with the mold pressure arm. -Having described .andillustratedmy.-,. present ==;invention- :ther-rightathereto I,.desiree. torobtain 'i'i-bylletters Patent, are: 7

.1. v A molding: machine comprising. a framehavring horizontally rectangular flask .support there- -.-':on; a mold:.pressure-arm pivotally mounted on either-zframe oni a vertical :axis adjacent one corner -;of=.-the flaskasupporttqthe v pressure arm extendipgihorizontallys and, diagonally over. the: flask .om-a verticalmxiszat-alocation centrally above 4 the flask support when the pressure arm is in its efiective position, the pressure arm pivotal to a position with the pressure plate thereon in a withdrawn position from over the flask support,

5 an arm extending laterally of the pressure plate,

a stationary arm fixedly attached to the frame,

a link pivotally connected between the arm and the stationary arm with the pivotal connections of the pressure arm, pressure plate to the pres- 10 surezarm; and the iends oi-theilink to th arms being "inparallelogram-arrangement whereby the mold pressure plate moves rectilinearly on pivotal motion of the pressure arm to effective and r-withdrawn position.

2. A molding machine comprising a frame having"a rectangular flask support thereon, a mold i.pressure.1:arm pivotally mounted on the frame on a vertical axis adjacent one corner of the flask support and extending horizontally thereover in its effective position, a mold pressure plate pivcotally'monntedonawVerticaIiaXis onethe pressure 'sarm; centrallyiabove. the .iflaskjsu port-when ;-the g-:-.pressure*iarm:;is intits. efiective. position, the pres- ::;sl1re1.-:arm- .-a1so;-movableuto. a 5 position with the zsspressure plate withdrawnhorizontally iromv above :jthe; flask support, ailink-i-pivotally connected at one :endto one, side ofthe pressure plate laterally .:of. the' pivotal aconnection thereoftto .the pressure arm, thetlinksheing pivotally :connectedsat its otherrendt-to a. fixedaportionof .the frame at a ulocation at a-distance from the, pivot: of .the pres- -:.-sure arm =equal :tOzihe distance from the .pivot -=,-of lthe pressure plate to -the pivotaluconnection tithereof'to theilink, the-pivot. 'ofsthe'pressure .arm --..and:the.-.pivotal connectionrof the linktothefixed -port-ion .of the framev locatedrinia-planeparallel :thekplaneofrthel pivotal connection of the link 1 thereto, 7 and the .pivotal connections atthe both ends voi the .link1being, equal to the. distance. beam tween, the pivot sof .Lthe. .pressure: arm I and the pressure plate.

' AIEARL Fe OYSTER.

REFERENCES'TCITED :1 The 'iollowingnreferences are "-Of'tlFBCOI'Cl; in the file of this patent:

UNITED STATES 'PATEN TS :Number Q Name K Date ;-236-,30l .-,Broadmeadow. r J -an. 4, 1 1881 92055.61 Fredericks, ;May 4, 1909 l;- =-1;24 9,994 .aN-icholls Dec.;,11, 1917 ;ls,2fi8,7,68 s-Pitfield June 4, v1918 .1,-367.,0;7-8 nNiChOllS \Feb.\ 1,1921 l,.6.6 1,598 :rBYerleinM. Mar. 6, 1928 824,009 Bullock Sept. 22,. .1931 

